hallett



5 f 3 sheets-sheetfl.

(N'o Model.)

G. HALLETT.

BOILBR.V

Patented Api.' so, 1889.

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' C. HLLETT.

BOILBR.

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GQHALLETT. BOILBR.

- N0- 402,441. Patented Aprf so, 1889.

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CHARLES HALLETT, OF -RIVERHEAD,

PATENT OFFICE.

NEW YORK, ASSIGNOR IO FRANCIS OARLL IIALLETT, OF SAME PLACE.

BolLER.

SPECIFl'.CA'IION' forming part 0f Letters Patent N0. 402,441, datedApril 30, 1889.

Application filed August 24, 1888. Serial No. 283,666- (No model.)

To a/ZZ whom it may concern:

Be it known that I, CHARLES HALLETT, residing at Riverhead, in thecounty of Suffolk and. State of New York, and a-citizen of the UnitedStates, have invented a new and useful Improvement in Boilers, of which,the following is a specifi-cation, reference being had to theaccompanying'drawin gs, in which- Figure l is a vertical centralsection, partly in elevation, of the boiler without the jacket. Fig. 2is a horizontal section at line 2 2 of Fig. 1. Fig. 3 is a horizontalsection at line 3 3 of Fig. l. Fig. Llis a horizontal section similar toFig. 2, showing the jacket applied t0 the boiler-shell.

This invention relates to that class of vertical boilers which havetubes radiating from a central column, or the so-called porcupineboiler. Y

Heretofore it has been necessary to complete the boiler at the place ofmanufacture,

and to transport the complete boiler to the place where it is to beused, or to employ skilled mechanics to rivet the parts together at theplace where it is to be used.

In many cases, and especially where the boiler is to be used in miningregions, either of the above methods is either impracticable or veryexpensive.

The object of this invention is to construct a boiler made up ofsections which can -be readily transported to mining regions, and whichcan be put together easily and quickly by unskilled mechanics, and toconstruct a jacket for the boiler and furnace-shell which can be readilyattached to the shell, which I accomplish as illustrated in the drawingsand hereinafter described.

That which I claim as new will be pointed out in the claims.

In the drawings, A represents the shell of the boiler, made of sectionsa, of boiler-iron, which are bolted together by bolts passing through'vertical flanges b and horizontal flanges c. The sections d are made ofsuch size that they can be readily carried and handled.

B is the shell of. the jacket of the boiler, composed of sections a',made of boiler-iron, which are joined together by bolts passing cylinderE is closed by a cap, h, and the lower 6o end is closed and supported ina base, t'.

F are radial tubes, made as usual, which are screwed into the cylinderE.

fis a steametrap.

vGr is the grate of the furnace, made of sections g, which are supportedat their inner ends on a flange (not shown) on the boilercylinder, andat their outer ends on a flange (not shown) on the shell A.

H is the door to the furnace.

I is a pipe to which the water-level is attached.

.I is the steam-pipe.

K is the water-supply pipe.

The boiler is set up at the place where it is to be used as follows: Thesections e of the cylinder E are joined bythe couplings d, the steamtrapf placed in position. The cap h is screwed on and the cylinder screwedinto the base-plate c', which is set at the desired 8o location for theboiler. The tubes F are then screwed into the cylinder E. The shell A isthen placed around the cylinder E and tubes F by bclting together thesections aby means of the anges b and c.

B is put around the shell A by joining together the sections a by theirflan ges b and c', asshown in Fig. 4, the asbestus or othernon-conducting material being iilledin as the 9o` sections are joined tothe sections of the shell A. It will thus be seen that the boiler ismade up of sections which can be easily transported to mining regions,and which can be easily f The steam and water pipes are then connectedas usual. The jacket put together at the place where it is to be used9.5

by unskilled mechanics, no riveting being required, as heretofore.

It will be understood that in cases where a large horsepower visrequired two or more boilers may be joined together, and the caloopacity ofa single boiler can be increased by 2. A Vertical boilerconsisting of a central 15 adding more sections to the cylinder E andcylinder composed of separable sections, and the shells A and havingscrewed therein radial tubes, in oom- In ease it is not desired to usethe jacket B bination with a casing and jacket divided 5 it may be takenolf. horizontally and vertically into separable sec- What I claim asnew, and desire to secure tions, and a packing of asbestns interposed:zo by Letters Patent, is as follows: between said casing and jacket,substantially L A'vertical boiler consisting of a central as described.cylinder composed of separable sections, pro- 1o 4vided With radialtubes F and connected by CHARLES HALLETT.

couplings d, in combination with a shell or casing composed of separablesections con- 'Witnessesz nected by flanges and bolts, substantially asHARRY T. JONES, describedo 'ROBERT A. MILLAR.

